This is something i have been researching on lately since my last frame build, and i would like you all's input.
Premise: Since my last drop floor standy frame (which in my opinion was built extra strong, and almost too strong for what it was intended for) i have been trying to think about the lightest possible frame design that will have just enough strength to be a good trailer.
For my drop floor standy frame build I used 2x2 1/8" inch wall tubing for almost the entire frame (minus the drop floor). Currently i have a 1972 Fiberglass Boler which is built out of 3x1.5 Rectangular Tubing (minus the drop floor in that which is maybe 1x1 angle) and im not sure if the Rectangular tubing is 1/8" wall or 14 gauge) Since having the Boler i have put about 30,000+ miles on it as i almost never unhook it from my vehicle. I have put that thing through some nasty terrain, and hit so many potholes that i swear i have broke my own suspension on my vehicle as well as the lonely trailer hanging out back. But to this day i havent really seen anything structurally crack on the Rectangular tubing of the boler. So this leads me into the Questions. How light can a person really go, and my real world knowledge (not book knowledge) is telling me a lot lighter than a person might think.
Square, Vs Rectangular, Vs Channel:
Round one: 2x2 1/8" Square vs 3x1.5 14 gauge Rectangular.............
Round two: 2x1 1/8" Channel vs 2x2 14 gauge Square....................
Round three: 3x1.5 14 gauge Rectangular vs 3x1.5 Channel...............
Round one winner? round two winner? round three winner? then best to worst in your opinion!!
This is minimal trailer i was thinking about building, and heres the awesome engineered CAD drawing i did for you guys!